We have added 7 baby Khaki Campbell girl ducklings to our farm. They are a happy bunch swimming in the pond all times of the day and night! They have a separated fenced in area from the chickens with a pond and grassy area to themselves. They are 10 weeks old now we have been feeding them non medicated baby chick feed. I have been reading that they do not absorb the niacin very well. Do we need to supplement niacin? Them seem to have no health issues looking at them.